Tanks follow the typical tank arrangement and keep the required air gap; larger tanks allow cleaning at the base; internal coatings are applied to the maker's instructions; drinking tanks have close-fitting covers, secured outdoors, with an access opening; overflows are sized for the inflow (DN 40 minimum in the 2003 text) and discharge visibly without damage or nuisance, with a telltale where not visible (2003 text).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.